Granted Patent
Utility
US 4,839,658 · App. 06/891,435
Process for en route aircraft conflict alert determination and prediction
Inventors:
Shawn Kathol, Patrick Williams
Patented Case
View Patent ↗
Granted: Jun 13, 1989
Filed: Jul 28, 1986
Inventors
Shawn Kathol
Patrick Williams
Assignee (at issue)
Hughes Aircraft Company
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.